Online Measurement Method for Circuit Breaker Mechanical–Time Characteristics Based on Transient Voltage and Current Signal Feature Extraction

Liting Weng, Jianhua Xia, Zhaochuang Zhang, Jingang Wang, Lin Chen, Yingbo Zi, Lingyi Ma, Xingyu Zhang, Fan Zhang and Pengcheng Zhao ()
Additional contact information
Liting Weng: Xiluodu Hydropower Plant, Zhaotong 657300, China
Jianhua Xia: Xiluodu Hydropower Plant, Zhaotong 657300, China
Zhaochuang Zhang: Xiluodu Hydropower Plant, Zhaotong 657300, China
Jingang Wang: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Lin Chen: Three Gorges Ecological Environment Co., Ltd., Zhaotong 657300, China
Yingbo Zi: Three Gorges Ecological Environment Co., Ltd., Zhaotong 657300, China
Lingyi Ma: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Xingyu Zhang: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Fan Zhang: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Pengcheng Zhao: State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China

Energies, 2024, vol. 18, issue 1, 1-16

Abstract: The good mechanical characteristics of circuit breakers are essential to ensuring their safe and stable operation. The characteristic signals at the points of initial opening and closing contain abundant information about the mechanical–time characteristics of the circuit breaker. Existing online measurement methods for circuit breaker mechanical–time characteristics typically rely on monitoring the secondary current signals of the opening and closing coils, or the signals such as vibration, pressure, and angular displacement that are generated during the opening and closing of moving and stationary contacts. Unlike these conventional approaches, this paper proposes an online measurement method for circuit breaker mechanical–time characteristics based on feature extraction from transient voltage and current signals in the primary circuit. By extracting features from the transient voltage and current signals in the primary circuit, this method obtains mechanical–time characteristics such as the points of initial opening and closing. This method is convenient and stable, enabling the online detection of the mechanical characteristics of the circuit breaker. Finally, a comparison and analysis of the online measurement results with the offline measurement results were conducted. The analysis shows that the calculation error of the opening and closing times is within 0.2 ms. This online detection method has a high measurement accuracy and provides a new approach for the online measurement of the mechanical characteristics of circuit breakers.

Keywords: circuit breaker; mechanical–time characteristics; online measurement; transient voltage; current signals (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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